JP2005133194A - Clamp device for heat-treated article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clamp device for a heat-treated article capable of performing a heat treatment work while suppressing any wave-shaped deformation of a non-heat-treated area of the heat-treated article. <P>SOLUTION: A quenched area which is a heat-treated area extending and demarcated in the longitudinal direction in a part of a raised portion 11 and a non-quenched area which is a non-heat-treated area extending and demarcated in the longitudinal direction in the other portion of the raised portion 11 and a flange part 13 are juxtaposed in the width direction orthogonal to the longitudinal direction on a slender heat-treated article 10 having the raised portion 11 extending in the longitudinal direction formed thereon. The flange part 13 is clamped by first and second clamp means 22 and 23 disposed in the longitudinal direction. One first clamp means 22 is a tight-clamp means to hold and fix the flange part 13, and a plurality of second clamp means 23 are loose-clamp means to loosely clamp the flange part 13 while permitting the heated article 10 to be curved and deformed such that the heated quenched area is positioned on the projected side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a heat treatment article clamping device for clamping an article to be heat treated when subjected to a heat treatment operation such as quenching in which heating and subsequent cooling are performed, for example, an elongated shape heat treatment made of a plate material. It can be used when quenching an article by an induction heating method or the like.

  The center pillar of a four-wheel vehicle is provided with a reinforcing member for securing a high strength against a side collision. This reinforcing member, which is a press-formed product of a steel plate and has an elongated shape, is orthogonal to the longitudinal direction. Two flange portions having a three-dimensional shape provided with a raised portion in the middle of the width direction and extending from the raised base end portions on both sides in the width direction of the raised portion to the outside in the width direction of the raised portion have. The following Patent Document 1, Patent Document 2, and Patent Document 3 disclose a quenching operation for partially reinforcing such a center pillar reinforcing member. Further, in Patent Document 2 and Patent Document 3, the longitudinal length of the reinforcing member for the center pillar, in which both the quenching region that is quenched by being cooled after heating and the non-quenching region that is not quenched, is elongated. It is disclosed to extend and define in the direction, and to arrange these quenching regions and non-quenching regions side by side in the width direction orthogonal to the longitudinal direction.

The center pillar reinforcing member is clamped by a clamping device during the quenching operation, but the clamping device shown in Patent Document 2 is configured to place a plurality of positions in the longitudinal direction of the center pillar reinforcing member in a stationary set state. Each flange portion that is a non-quenched region is clamped and fixed.
Japanese Patent Laid-Open No. 10-17933 (paragraph number 0042, FIG. 4) JP 2000-256733 (Abstract, paragraph numbers 0037 to 0040, 0044, 0045, FIGS. 1 to 3) JP 2003-160062 (Abstract, FIGS. 4 and 8)

  A heat treatment operation represented by a quenching operation is performed by heating the article to be heat treated to a high temperature and then cooling it, and thus heat distortion is likely to occur, particularly when the article to be heat treated is made of a plate material. It is necessary to pay attention to this point because it is more likely to occur.

  Like the center pillar reinforcing member described above, both the quenching region and the non-quenching region are extended and defined in the longitudinal direction, and these quenching region and the non-quenching region are orthogonal to the longitudinal direction. In the case where the quenching operation is performed on the elongated heat-treated articles arranged side by side in the width direction, when the quenching region is heated, the quenching region to be thermally expanded is caused by the non-quenching region. Due to the restraint, compression yielding may occur in the quenching region. When this compressive yielding occurs, tensile stress is generated in the quenching region and compressive stress is generated in the non-quenching region after quenching by cooling, based on a decrease in the length dimension of the quenching region due to compression yielding. When the compressive stress in the non-quenched region exceeds the elastic limit at room temperature for the material of the heat-treated article, there arises a problem that the non-quenched region is deformed into a wave shape.

  Like the clamp apparatus disclosed in Patent Document 2 described above, a clamp apparatus for a heat-treated article is configured to clamp and fix a plurality of longitudinal positions of the article to be heat-treated in a non-quenched region. And, because the thermal expansion of the quenching region is strongly constrained by the non-quenching region, the quenching work is performed in a state where compression yielding is likely to occur in the quenching region. It is difficult to eliminate the deformation to a wave shape.

  The above problems also occur when performing heat treatment / cooling heat treatment such as tempering and annealing other than quenching.

  The present invention is based on the knowledge that the inventor can suppress the deformation of the non-heat-treated region into a wave shape by taking a measure that does not suppress the thermal expansion of the heat-treated region during heating or a measure that relaxes the restraint. It was obtained.

  An object of the present invention is to provide a clamp device for a heat-treated article that can perform a heat treatment operation while suppressing deformation of a non-heat-treated region of the heat-treated article into a wave shape.

  In the clamping device for heat-treated articles according to the present invention, at least one heat-treated region that is heat-treated by being cooled after heating and at least one non-heat-treated region that is not heat-treated are extended and defined in the longitudinal direction. In addition, these heat-treated regions and non-heat-treated regions are elongated heat-treated articles arranged side by side in the width direction orthogonal to the longitudinal direction, and a heat-treated work is performed on the heat-treated products in a stationary set state. In some cases, the apparatus for clamping a heat-treated article for clamping in the non-heat-treated region has a plurality of clamping means arranged in the longitudinal direction of the article to be heat-treated. At least one clamping means including the clamping means disposed at a position closest to the end portion is such that the heat treatment region side is a convex side, and the heat treatment is performed. Goods is characterized in that has a loose clamping means to allow the bending deformation.

  According to this clamping apparatus, at least one clamping means including a clamping means disposed at a position closest to an end in the longitudinal direction among a plurality of clamping means disposed in the longitudinal direction of the article to be heat treated. However, since the heat treatment region side is a convex side and is a loose clamp means that allows the heat treatment article to bend and deform, the heat treatment region is thermally expanded when the heat treatment region is heated. It is allowed to bend and deform with the convex side as a convex side. Thereby, the thermal expansion of the heat treatment region is not suppressed by the non-heat treatment region or the suppression is mitigated, and therefore, the occurrence of compressive yielding in the heat treatment region is suppressed, and the article to be heat treated after the heat treatment operation is suppressed. It is possible to eliminate or reduce the deformation of the non-heat treated region into a wave shape.

  In this clamping apparatus, all of the plurality of clamping means arranged in the longitudinal direction of the article to be heat treated may be loose clamping means, and one clamping means arranged at a position closest to the end in the longitudinal direction. Only the loose clamp means may be used.

  Further, in this clamping apparatus, a plurality of clamping means arranged in the longitudinal direction of the article to be heat treated are first clamping means and second clamping means, and the number of the first clamping means is one in the longitudinal direction of the article to be thermally treated. The number of the second clamp means disposed apart from the first clamp means in the longitudinal direction of the article to be heat treated is a tight clamp means for sandwiching and fixing the non-heat treated region. May be at least one in the longitudinal direction of the article to be heat treated, and the second clamping means may be loose clamping means.

  According to this, heat treatment work can be performed in a state in which the article to be heat treated is fixed at a predetermined position of the clamping device by the tight clamp means. Thus, the heat treatment can be performed even in a vertical posture or an inclined posture.

  In addition, the stationary set state of the article to be heat-treated may be that the article to be heat-treated is not fixed by all the clamping means which are loose clamp means, and may be set in a horizontal posture or a substantially horizontal posture on the clamping device. By fixing the article to be heat-treated with the first clamping means, the article to be heat-treated may be set in the clamping device in a horizontal posture, a substantially horizontal posture, a vertical posture, or an inclined posture.

  The position for clamping the non-heat treated region in each of the plurality of clamping means is preferably adjustable in a direction perpendicular to the longitudinal direction and the width direction of the article to be heat treated.

  According to this, it becomes possible to cope with various kinds of heat-treated articles having different shapes, and the clamping device has versatility.

  Moreover, it is preferable that the size of the gap in which the non-heat treatment region in the loose clamp means is inserted and adjusted is adjustable.

  According to this, it becomes possible to set the size of the gap in the loose clamp means to an appropriate size with respect to the amount of bending deformation of the article to be heat-treated which occurs on the side of the heat treatment region as the convex side, It becomes possible to cope with various types of heat-treated articles having different deformation amounts.

  In this way, it is possible to adjust the position for clamping the non-heat treatment region in each of the plurality of clamping means and the size of the gap in which the non-heat treatment region is inserted and arranged in the loose clamp means. For example, using a shim as a spacer, making a hole for inserting a fastener such as a bolt into a long hole, a so-called turnbuckle mechanism using right and left screws, This can be realized by a feed screw mechanism.

  Furthermore, it is preferable that the loose clamp means is provided with a movement smoothing means for smoothening the movement of the non-heat treated region in the longitudinal direction of the article to be heat treated.

  According to this, when the article to be heat treated is curved and deformed with the convex side of the heat treatment region, the non-heat treatment region moves in the longitudinal direction of the article to be heat treated with respect to the loose clamp means. It is possible to facilitate the thermal expansion of the heat treatment region not to be constrained by the non-heat treatment region.

  The movement smoothing means may be any means, for example, a quenching process, a plating process, or a polishing process performed on the components of the loose clamp means, or a roller that can reduce frictional resistance on the loose clamp means. A rotating member or a member with small sliding friction may be attached.

  The elongated heat-treated article clamped during the heat treatment operation by the clamping device according to the present invention may be a three-dimensional shape or a planar shape.

  An example of the article to be heat-treated is an article made of a plate material, and is provided with a raised portion extending in the longitudinal direction and extending in the direction perpendicular to the longitudinal direction and the width direction in the middle of the width direction orthogonal to the longitudinal direction. And has two flange portions extending outwardly in the width direction from the ridge end portions on both sides in the width direction of the ridge portion, and at least a part of the ridge portion serves as a heat treatment region. Goods.

  In this clamping apparatus for the article to be heat treated, the plurality of clamping means described above are arranged in the longitudinal direction of the article to be heat treated for each of the two flange portions that are non-heat treated regions.

  Further, the cooling for the heat treatment of the article to be heat-treated may be performed from one side in the direction orthogonal to the longitudinal direction and the width direction, in other words, the direction orthogonal to the longitudinal direction and the width direction of the article to be heat-treated. When it is the front and back direction, it may be performed from one side of the front and back and may be performed from both sides of the front and back.

  When this cooling is performed from one side in the direction perpendicular to the longitudinal direction and the width direction, a plurality of clamping means arranged in the longitudinal direction of the article to be heat treated are arranged in the longitudinal direction and the width direction. Clamping means that applies a load to the non-heat-treated region to cause a curved convex deformation to one side in the orthogonal direction, and cooling for the heat treatment is performed from the other side in the direction orthogonal to the longitudinal direction and the width direction. Is preferred.

  This is because the heat treatment region is heated, and therefore, in this heat treatment region, the entire thickness of the article to be heat treated made of a plate material is heated to the same or substantially the same high temperature, and then cooling is orthogonal to the longitudinal direction and the width direction. When the cooling is performed from one side, at the moment when the cooling is performed, a large temperature difference occurs between the cooling side and the opposite side, and the cooling on the cooling side may cause a compression yield on the non-cooling side. Due to the reduction in the length of the non-cooled side caused by this compression yielding, when the clamp of the clamping device is released after the heat treatment operation is finished, the warped deformation of the heat-treated article with the cooling side as the convex side may occur. It is.

  On the other hand, as described above, the plurality of clamping means arranged in the longitudinal direction of the article to be heat-treated causes the article to be heat-treated to be curved and convexly deformed to one side in the direction orthogonal to the longitudinal direction and the width direction. When a load for applying heat is applied to the non-heat treatment region and cooling is performed from the other side in the direction orthogonal to the longitudinal direction and the width direction, the article to be heat-treated is curved and deformed in the opposite direction to the warp deformation due to the load. Since the heat treatment operation is performed in this state, the occurrence of the warp deformation can be eliminated or reduced.

  In addition, at least one position can be adjusted in a direction perpendicular to the longitudinal direction and the width direction among a plurality of positions where the non-heat treated region is clamped by a plurality of clamping means arranged in the longitudinal direction of the article to be heat treated. Then, it becomes possible to adjust the magnitude of the load for causing the article to be heat-treated to be curved and convexly deformed as described above, and the amount of curved convex deformation is accurately set to an amount necessary to eliminate or reduce warping deformation. It becomes possible.

  Furthermore, when the cooling is performed from one side in the direction orthogonal to the longitudinal direction and the width direction as described above, the side on which the cooling is performed is one of the inside and the outside of the raised portion, in this case, A plurality of clamping means apply a load to the article to be heat-treated to press and displace the bulging base end portions on both sides in the width direction of the bulging portion to the one side of the inside and outside of the bulging portion in the width direction. Clamping means is preferred.

  This is because the phenomenon that compression yielding occurs on the non-cooling side due to cooling on the cooling side and warpage deformation occurs on the article to be heat-treated may occur also in the width direction of the article to be heat-treated.

  Even if the warped deformation in the width direction of the article to be heat treated is an unacceptable size or a size that cannot be corrected, a plurality of clamping means are provided on the raised base ends on both sides in the width direction of the raised portion. In the width direction, when the clamp means applies a load to the article to be heat-treated to be pressed and displaced to the one side to be cooled out of the inside and outside of the raised portion, the load is applied to the article to be heat-treated. It is possible to eliminate or reduce the occurrence of warp deformation in the width direction of the article to be heat-treated, in other words, occurrence of deformation in the width direction of the raised portion.

  The loose clamp means of the clamping device according to the present invention may have continuity in the longitudinal direction of the article to be heat treated and may have a length in this longitudinal direction, or may be mutually in the longitudinal direction of the article to be heat treated. A plurality may be provided in a separated state.

  According to the latter, even if the article to be heat-treated has a shape that is deformed in a direction orthogonal to the longitudinal direction and the width direction as it extends in the longitudinal direction, a structure in which a plurality of loose clamp means are scattered in the longitudinal direction. Therefore, the manufacturing operation of the constituent members of the loose clamping means and the assembly operation of the clamping device can be facilitated.

  Further, each of the plurality of clamping means in the clamping device according to the present invention can have an arbitrary structure by an arbitrary member. One example is that each of these clamping means includes an upper clamp member and a lower clamp member that are opposed to each other in the vertical direction.

  Further, as described above, the plurality of clamp means arranged in the longitudinal direction of the article to be heat treated are the first clamp means and the second clamp means arranged in the longitudinal direction of the article to be heat treated, and the first clamp In the case where the means is a tight clamp means for sandwiching and fixing the non-heat treated region and the second clamp means is a loose clamp means, the upper clamp member and the lower clamp member constituting the first clamp means The non-heat treated region portion may be clamped and fixed, and the gap between the upper clamp member and the lower clamp member constituting the second clamp means may be made larger than the thickness of the non-heat treated region portion of the article to be heat treated.

  Further, in order to clamp and fix the non-heat treatment region portion by the first clamp means, at least one of the upper clamp member and the lower clamp member of the first clamp means is moved by swinging or sliding relative to the other. This movement may be performed manually or automatically by a driving means such as a cylinder. And, in order to make the gap between the upper clamp member and the lower clamp member of the second clamp means which are loose clamp means larger than the thickness of the portion of the non-heat treatment region, At least one of the lower clamp members may be moved by swinging or sliding with respect to the other, or may be performed manually or automatically by driving means such as a cylinder.

  In addition, a mechanism for causing at least one of the upper clamp member and the lower clamp member in the first clamp means and the second clamp means to move such as swinging and sliding with respect to the other is arbitrary. One is a toggle mechanism. The operation of the toggle mechanism may be performed manually or automatically by driving means such as a cylinder.

  When at least one of the clamp means is configured with a toggle mechanism structure, for example, as described above, the article to be heat-treated is curved and convexly deformed to one side in the direction perpendicular to the longitudinal direction and the width direction. When clamping, the clamp member that presses the article to be heat-treated of the clamping means can be clamped to a position-controlled state where it is not pushed back by a large reaction force from the article to be heat-treated. Can be instantaneously performed by inputting a small clamp load to the clamp means by manual operation or automatic drive means such as a cylinder. In addition, when the toggle mechanism having such a feature is used for the second clamp means which is a loose clamp means, a gap for clamping the article to be heat treated loosely without losing a large reaction force from the article to be heat treated, A stable size can be secured.

  Furthermore, in order to perform the heat treatment operation by clamping a portion of the non-heat treated region of the heat treated article with the upper clamp member and the lower clamp member of the plurality of clamp means arranged in the longitudinal direction of the heat treated article, The upper clamp member and the lower clamp member may be arranged on a work table for setting the article to be heat-treated.

  In addition, at least one of the plurality of clamp means arranged in the longitudinal direction of the article to be heat-treated is configured to include an upper clamp member and a lower clamp member arranged to face each other in the vertical direction. If present, at least one of the upper clamp member and the lower clamp member may be disposed on a lifting member that moves up and down relative to the other. According to this, the article to be heat-treated is clamped by the upper clamp member and the lower clamp member by moving one side toward the other by the lifting member, and by moving one side away from the other, The clamp of the article to be heat-treated by the upper clamp member and the lower clamp member is released.

  When the lower clamp member is disposed on the elevating member among the upper clamp member and the lower clamp member, the article to be heat-treated is placed and set on the lower clamp member, and the lower clamp member is raised by the elevating member. The article to be heat-treated can be clamped by the upper clamp member and the clamp member.

  As described above, when the article to be heat-treated is placed and set on the lower clamp member, this placement set may be made while the lower clamp member is being lifted by the lifting member. It may be made before the start of raising the member.

  Further, when the lower clamp member is disposed on the elevating member that moves up and down toward the upper clamp member as described above, the upper clamp member can be disposed on the immovable member that does not move up and down toward the lower clamp member. . A heating device for heating the heat treatment region of the article to be heat treated may be attached to the stationary member.

  When the heating device is attached to the immovable member in this way, the heating device itself and the electric cable, piping, and the like, which are accessory members of the heating device, do not move up and down, so the structure of the entire clamping device can be simplified.

  In the present invention, the heating device for heating the heat treatment region of the article to be heat treated may be an induction heating method using a high frequency current, a gas flame, or a laser beam, and is optional.

  The heating apparatus may be of a batch heating type that heats the entire heat treatment region at the same time, or has a heating unit that heats a part of the heat treatment region and moves relative to the article to be heat treated. This heating unit may heat the entire heat treatment region.

  Further, the clamping device according to the present invention can be used when heat-treating an article used for an arbitrary application, an example of the article is a reinforcing member for a center pillar of a four-wheel vehicle, and another example is a four-wheel vehicle. A front bumper or a rear bumper of a vehicle, and another example is a door impact beam.

  Furthermore, a typical example of heat treatment is quenching, but the clamping device according to the present invention is not only for quenching work, but also for other heat treatment work such as tempering work after quenching and annealing work, and further with shape correction. The present invention can also be applied when performing these heat treatment operations. In addition, the clamping device according to the present invention uses a heat treatment operation for making the quenched region as it is as a tempered region, and a comprehensive region including one or a plurality of quenched regions as a tempered region. Can also be applied to a heat treatment operation that becomes a non-tempered region. Furthermore, the clamping device according to the present invention performs a softening operation such as annealing for the region in order to improve the workability of the region subjected to a high degree of deformation in a part of the blank to be pressed. It can also be applied to a case where a heat treatment operation such as softening the region so as to be easily buckled is performed on a partial region of the press-formed product.

  According to the present invention, it is possible to obtain an effect that the heat treatment operation can be performed while suppressing the non-heat treatment region of the article to be heat treated from being deformed into a wave shape.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated based on drawing. The heat treatment according to the present embodiment is quenching, and the to-be-quenched article as the article to be heat-treated is a reinforcing member for a center pillar of a four-wheel vehicle. As shown in FIG. 1, the center pillar reinforcing member 10 is a member constituting the side panel 1 of the vehicle, and the strength of the side panel 1 against a side collision between the front door 2 and the rear door 3 is increased. In order to increase the size, the side panel 1 is installed vertically between the roof portion 1A and the floor portion 1B.

  Further, as shown in FIG. 2, the center pillar reinforcing member 10 which is a press-formed product of a steel plate has an elongated shape, and in the middle of the width direction orthogonal to the longitudinal direction, the longitudinal direction and width A bulging portion 11 bulging in a direction orthogonal to the direction is provided, and two flange portions 13 are formed from the bulging base end portions 12 on both sides in the width direction of the bulging portion 11 extending in the longitudinal direction of the reinforcing member 10. It extends outward in the width direction. For this reason, the cross-sectional shape in the longitudinal direction of the reinforcing member 10 is a hat shape, and the flange portion 13 and the top surface portion 11A of the raised portion 11 are connected by the side surface portion 11B of the raised portion 11, and the side surface portion 11B and the flange are connected. A connecting portion with the portion 13 is the raised proximal end portion 12.

  The quenching region 14, which is a heat treatment region indicated by the hatched display range in FIG. 2, is defined across the top surface portion 11 </ b> A and the side surface portion 11 </ b> B of the raised portion 11 and extends in the longitudinal direction of the reinforcing member 10. The quenching regions 14 are on both sides in the width direction of the raised portions 11, and both sides in the width direction of these quenching regions 14 are non-quenching regions 15 that are non-heat treated regions. For this reason, the reinforcing member 10 having a three-dimensional elongated shape is provided with two quenching regions 14 extending and defined in the longitudinal direction in the width direction perpendicular to the longitudinal direction. Three quenching regions 15 are provided in the width direction, and these quenching regions 14 and non-quenching regions 15 are alternately arranged in the width direction.

  The flange portion 13 is a part of the non-quenched region 15, and the reinforcing member 10 is clamped by the clamp device 20 shown in FIG. 3 for the quenching operation. Clamping by the clamping device 20 is performed with the longitudinal direction of the reinforcing member 10 that is an object of the quenching operation being set in the horizontal direction or the substantially horizontal direction. Therefore, in the following description, the reinforcing member 10 is referred to as an article to be heat-treated 10. The horizontal direction in which the article to be heat-treated 10 extends is the X direction, the width direction of the article to be heat-treated 10 perpendicular to the X direction is the Y direction, and the direction perpendicular to the X direction and the Y direction is the Z direction.

  The clamping device 20 is configured such that a first clamping means 22 and a second clamping means 23 are installed on a work table 21 on which the article to be heat treated 10 is set for quenching work. In other words, the work table 21 is a table with the clamp device 20. The first clamping means 22 and the second clamping means 23 arranged in the X direction clamp the flange portion 13, and the number of the first clamping means 22 is one in the X direction. The number of the second clamp means 23 arranged apart from the first clamp means 22 in the X direction is plural, and four in this embodiment. As described above, there are two flange portions 13 in the Y direction. For each of these flange portions 13, the first clamp means 22 and the second clamp means 23 are provided by the number described above. The number of the first clamping means 22 and the second clamping means 23 is twice as many as the number. The article to be heat-treated 10 is set in a fixed position in the horizontal or substantially horizontal posture on the clamping device 20 by the first clamping means 22 and the second clamping means 23.

  4 shows a front view of the clamping device 20, and FIG. 5, which is a sectional view taken along line S5-S5 of FIG. 4, shows the first clamping means 22 disposed at one end in the X direction. The structure is shown. 4 is a cross-sectional view taken along the line S6-S6 of FIG. 4, and the four second clamps arranged in a state of being separated from the first clamp means 22 toward the other end in the X direction. Of the means 23, the structure of the second clamp means 23 that is the third from the first clamp means 22 is shown, but the structure of all the second clamp means 23 is the same.

  As shown in FIGS. 3 and 4, the first clamping means 22 includes a base 24 installed and fixed on the work table 21 and a presser fastened by a detachable fastener 26 </ b> A on the upper surface of the base 24. As shown in FIG. 5, the flange portion 13 is vertically moved between the base 24 and the presser member 25 by fastening the presser member 25 to the base 24 with a fastener 26 </ b> A. It is pinched and fixed. For this reason, the 1st clamp means 22 is a tight clamp means for clamping the flange part 13 immovably by the base 24 and the pressing member 24 which are the lower clamp member and the upper clamp member.

  As shown in FIGS. 3 and 4, each second clamp means 23 includes a clamp body 27 coupled to a bracket 26 erected on the work table 21, and a connecting member 28 attached to the clamp body 27. And a presser member 29 that is connected to each other. As shown in FIG. 6, the presser member 29 disposed on the upper portion of the clamp body 27 can swing up and down around the shaft 30 with respect to the connecting member 28, and the presser member 29. By aligning the holes formed in the connecting member 28 and inserting the pin 31 into these holes, the holding member 29 opens a predetermined gap 32 in the Z direction with respect to the clamp body 27 and moves up and down. Opposed. For this reason, the arrangement of the flange portion 13 in the gap 32 can be performed by downward swinging of the pressing member 29 around the shaft 30 and insertion of the pin 31 into the hole. The size of the gap 32 is larger than the thickness of the flange portion 13.

  Therefore, the second clamping means 23 is a loose clamping means for clamping the flange portion 13 so as to be movable in the X direction and the Z direction, and the clamp body 27 is a lower clamping member of the second clamping means 23. The pressing member 29 is an upper clamp member of the second clamp means 23.

  Further, the article to be heat-treated 10 when the flange portion 13 is clamped by the first clamping means 22 and the second clamping means 23 and set on the work table 21 as described above is the no-load indicated by the two-dot chain line in FIG. Compared with the heat-treated article 10 ′ in the natural state, it is in a state of being curved and convexly deformed upward in the Z direction, which is the vertical direction. That is, a load that causes the heat treated article 10 to be curved and deformed to the surface side of the heat treated article 10 that is the protruding direction of the raised portion 11 is applied to the flange portion 13 by the first clamp means 22 and the second clamp means 23. In this state, the article to be heat-treated 10 is clamped by the clamping device 20. Therefore, as shown in FIG. 6, in the position where the second clamp means 23 is disposed, the holding member 29 abuts on the upper surface of the flange portion 13, and a gap is formed between the lower surface of the flange portion 13 and the clamp body 27. Has occurred.

  In order to finely adjust the curved convex deformation amount of the article to be heat-treated 10, in this embodiment, a position for clamping the flange portion 13 in the first clamping means 22 and a position for clamping the flange portion 13 in the second clamping means 23 As shown in FIG. 4, this adjustment in the Z direction is performed between the work table 21 and the base 24 of the first clamp means 22, and between the work table 21 and the second clamp means 23. This is done by interposing a shim 33 having an appropriate thickness as a spacer between the bracket 26 and the bracket 26.

  Further, the upper surface 27A of the clamp body 27 shown in FIG. 6 and the lower surface 29A of the holding member 29 of the second clamp means 23 vertically opposed to the flange portion 13 when the article to be heat treated 10 is clamped are hardened by hardening. Polishing is done. Thereby, the 2nd clamp means 23 is provided with the movement smooth means for making the movement to the X direction of the flange part 13 smooth.

  Further, the upper surface 27 </ b> A of the clamp body 27 and the lower surface 29 </ b> A of the pressing member 29 are surfaces facing the flange portion 13 in parallel or substantially in parallel.

  As shown in FIG. 4, above the work table 21, a heating device 40 for heating the quenching region 14 of the article to be heat-treated 10 clamped by the clamping device 20 is disposed so as to be movable up and down. This heating device 40 inductively heats the quenching region 14 with a high-frequency current. Therefore, as shown in FIGS. 5 and 6, the heating device 40 receives a high-frequency current supplied from a power supply device (not shown). An inductor 41 to be energized is provided. Since these inductors 41 are disposed in the heating device 40 so as to cover the entire quenching region 14, the heating device 40 can collectively heat the entire quenching region 14. This is an induction heating device.

  The heating device 40 is moved up and down by the lifting means, and when the article to be heat-treated 10 is clamped by the clamp device 20, the heating apparatus 40 is lowered and set on the article to be heat-treated 10.

  As shown in FIG. 4, the work table 21 is provided with a coolant flow pipe 42 as a cooling device, and the article to be heat-treated 10 is clamped by the clamp device 20 and set on the work table 21. When this is done, as shown in FIGS. 5 and 6, the coolant circulation pipes 42 in which the coolant jets are formed are inserted into the raised portion 11 that opens downward. .

  After the article to be heat-treated 10 is clamped by the clamp device 20 and set on the work table 21, the heating device 40 is lowered, and the heating device 40 is set on the article to be heat-treated 10. Then, by energizing the heating device 40 with a high-frequency current from the power supply device, the entire quenching region 14 of the article to be heat-treated 10 is induction-heated all at once from the surface side of the article to be heat-treated 10. After heating to a predetermined temperature, the energization is stopped. Next, the coolant is ejected from the ejection port of the coolant circulation pipe 42, whereby the article to be heat-treated 10 is cooled from the back surface side, and the quenching region 14 is quenched. Thereafter, the clamp of the article to be heat-treated 10 by the clamping device 20 is released, and the article to be heat-treated 10 is sent to the next process such as a painting process.

  In the above, when the quenching region 14 of the article to be heat-treated 10 clamped by the clamping device 20 is heated by the heating device 40, one of the top surface portion 11A and the side surface portion 11B of the raised portion 11 as described with reference to FIG. The quenching region 14 defined in the part thermally expands with respect to the other part of the side surface part 11B and the non-quenching region 15 provided in the flange part 13. Since the quenching region 14 extends in the X direction, the article to be heat-treated 10 is expanded on the top surface portion 11A of the raised portion 11 where the quenching region 14 is provided in the X direction by the thermal expansion of the quenching region 14. The entire side tends to be curved and deformed.

  In the clamping device 20 of the present embodiment, as described above, the first clamping means 22 disposed at one end in the X direction is a tight clamping means for sandwiching and fixing the flange portion 13. Each second clamp means 23 arranged on the other end side in the X direction from the first clamp means 22 becomes a loose clamp means having a gap 32 larger in the Z direction than the thickness of the flange portion 13. Therefore, the clamping device 20 allows the article to be heat-treated 10 to be curved and deformed with the top surface portion 11A side of the raised portion 11 being a convex side. Thereby, the thermal expansion of the quenching region 14 is not suppressed by the non-quenching region 15, or the suppression by the non-quenching region 15 is relaxed.

  For this reason, when the article to be heat-treated 10 is heated, compression yielding does not occur or hardly occurs in the quenching region 14, and the length dimension in the X direction of the quenching region 14 generated when compression yielding occurs. Decrease or less likely to occur. Therefore, at the end of the quenching operation in which the clamping by the clamp device 20 is released, a stress that corresponds to the tensile stress generated in the quenching region 14 when compression yielding occurs is larger than the elastic limit in the non-quenching region 15. The occurrence of compressive stress can be suppressed, whereby the flange portion 13 that is the non-quenched region 15 can be eliminated or reduced in a wave shape.

  Further, when the article to be heat-treated 10 is curved and deformed due to the thermal expansion due to the heating of the quenching region 14 and the top surface portion 11A side of the raised portion 11 being a convex side, the second clamping means 23 serving as a loose clamping means. , The flange portion 13 moves slightly to one side in the X direction. This movement is made while the flange portion 13 is in contact with the upper surface 27A of the clamp main body 27 or the lower surface 29A of the pressing member 29 of FIG. 6 constituting the second clamp means 23. As described above, the upper surface 27A of the clamp body 27 and the lower surface 29A of the pressing member 29 are subjected to hardening treatment and polishing by quenching, whereby the second clamp means 23 moves so that the flange portion 13 moves smoothly. Since the smooth means is provided, the flange portion 13 moves smoothly with respect to the second clamp means 23.

  For this reason, also in this respect, the flange portion 13 that is the non-quenched region 15 does not suppress the thermal expansion of the quenched region 14, thereby promoting that the compressive yield does not occur in the quenched region 14. Can be made.

  Further, as described above, the upper surface 27A of the clamp main body 27 and the lower surface 29A of the pressing member 29 are surfaces facing the flange portion 13 in parallel or substantially parallel to each other. Thus, the load in the Z direction from the flange portion 13 is received, and thereby, it is possible to suppress deformation of the flange portion 13 from being deformed at the position where the second clamp means 23 is disposed.

  By the way, in this embodiment, quenching of the quenching region 14 performed by ejecting the coolant from the coolant flow pipe 42 is performed from the lower side with respect to the article to be heat treated 10, in other words, from the back side of the article to be heat treated 10. Made. For this reason, when considering the quenching region 14 extending and defined in the X direction, after the entire thickness of the article to be heat-treated 10 is heated to the same or substantially the same temperature in this quenching region 14, When the back side of the article to be heat-treated 10 is cooled by jetting, at the moment when the cooling is performed, the thickness of the article to be heat-treated 10 is lowered to near the normal temperature and the thickness portion on the front side maintaining the high temperature. A thickness portion on the back side is generated. As a result, the compressive yielding in the X direction is generated in the thickness portion on the front side due to the restraint of the thickness portion on the back side, and the length dimension in the X direction in the thickness portion on the front side caused by this compressive yielding is reduced. At the end of the quenching operation in which the clamping by the apparatus 20 is released, warpage deformation is generated in the article to be heat-treated 10 with the back side being a convex side.

  However, as described above, the clamping device 20 according to the present embodiment uses the first clamping means 22 and the second clamping means 23 to apply a load that causes the article to be heat-treated 10 to bend and project in the protruding direction of the protruding portion 11. 13, whereby the article to be heat-treated 10 is clamped by the clamping device 20 in a curved deformation state with the front side being a convex side, and heating and cooling for quenching work are performed in this state. The warpage deformation can be prevented from occurring in the article to be heat-treated 10 or the generation amount thereof can be reduced.

  Furthermore, in this embodiment, the position where the flange portion 13 is clamped in the first clamp means 22 and the position where the flange portion 13 is clamped in the second clamp means 23 are the work table 21 and base 24 shown in FIG. Since the thickness of the shim 33 intervening between the work table 21 and the bracket 26 can be changed, the above-mentioned curved convex deformation amount of the article to be heat-treated 10 when the clamp device 20 is clamped is adjusted. This makes it possible to accurately set the curved and convex deformation amount to an amount necessary for eliminating or reducing the warpage deformation occurring in the article to be heat-treated 10.

  Although the above warp deformation was in the X direction, the quenching region 14 has a small size but also has a dimension in the Y direction. Regarding the direction, it also occurs in the direction of widening the gap between the openings of the raised portions 11. However, the dimension in the Y direction of the quenching region 14 is small, and the dimension in the Y direction of the entire article to be heat-treated 10 is also small compared to the dimension in the X direction. In addition, since the side surface portion 11B of the raised portion 11 of the article to be heat-treated 10 has a spring property in the Y direction, warpage deformation in the Y direction of the article to be heat-treated 10 is caused to be different from that of the article to be heat treated 10 and other members. Therefore, the clamping device 20 according to the present embodiment is not provided with means for eliminating or reducing warpage deformation in the Y direction.

  Of course, the clamping device can be provided with means for eliminating or reducing warpage deformation in the Y direction, and embodiments of such a clamping device will be described with reference to FIGS.

  Further, according to the present embodiment, the second clamp means 23 which is a loose clamp means does not have a large continuous length in the X direction, and the second clamp means 23 is not in the X direction. Since the dimensions are short and a plurality of dots are arranged in the X direction, the flange portion 13 clamped by the second clamp means 23 is deformed in the Z direction as it extends in the X direction. Even in this case, the production work of the clamp body 27 and the pressing member 29 forming the gap 32 shown in FIG. 6 where the flange portion 13 is disposed can be easily performed, and the assembly work of the clamp device 20 can be easily performed. Yes.

  7 and 8 show the first clamping means 52 and the second clamping means 53 that can perform the clamping operation and the clamping releasing operation of the flange portion 13 by automating them.

  The first clamp means 52 in FIG. 7 is attached to a bracket 54A provided on a base 54 serving as a lower clamp member so that a presser member 55 serving as an upper clamp member can swing up and down around a shaft 55A. A hydraulic cylinder 56 is connected to the presser member 55 which is a lever type. The presser member 55 performs clamping to clamp the flange portion 13 together with the base 54 and release the clamp by swinging by the hydraulic cylinder 56.

  Further, the second clamp means 53 of FIG. 8 is also capable of swinging up and down around the shaft 59A with the presser member 59 serving as the upper clamp member on the bracket 57A provided on the clamp body 57 serving as the lower clamp member. A hydraulic cylinder 58 is connected to the presser member 59 that is attached and lever-type, and the presser member 59 clamps the flange portion 13 together with the clamp body 57 loosely by swinging by the hydraulic cylinder 58. And release the clamp.

  In order to allow the pressing member 59 to loosely clamp the flange portion 13 together with the clamp body 57, a notch portion 60 into which the flange portion 13 can be inserted is formed on the lower surface of the distal end portion of the pressing member 59 on the flange portion 13 side. The vertical dimension of the notch 30 when the lower surface 59B of the pressing member 59 contacts the upper surface of the clamp main body 57 is larger than the thickness of the flange portion 13.

  7 and 8, the cylinder for swinging the pressing members 55 and 59 may be an air cylinder.

  FIG. 9 shows an embodiment in which the second clamp means 73 which is a loose clamp means of the clamp device 20 has a toggle mechanism structure, and FIG. 10 shows the second clamp means 73 when the clamp is released. These drawings show only the second clamp means 73 on one side because the second clamp means 73 arranged on both sides in the Y direction of the article to be heat-treated 10 have a symmetrical structure with respect to the Y direction. .

  An elevating member 72 is attached to the base member 71 fixed to the work table 21 of the clamping device 20, and a clamp body 77 of the second clamping means 73 is installed on the upper surface of the elevating member 72. The elevating member 72 is attached to the base member 71 by inserting a fastener 74, which is a bolt, into a long hole 71A formed in the base member 71 so as to be long in the vertical direction, and the fastener 74 is used as a screw hole of the elevating member 72. Since it is made by screwing, the height position of the second clamp means 73 is adjusted by lifting the elevating member 72 by loosening the fastener 74.

  On the upper side of the clamp body 77 serving as the lower clamp member of the second clamp means 73, a press member 79 serving as the upper clamp member of the second clamp means 73 is disposed. 10 is attached to the clamp body 77 so as to be able to swing up and down by a shaft 80 at the end opposite to the shaft 10. The lower end of the bending link member 81 is connected to the clamp body 77 by a shaft 83, and the piston rod of a cylinder 85 attached to the upper end of the bending link member 81 by a shaft 84 so as to be swingable. 85A is connected by a shaft 86. The cylinder 85 may be a hydraulic cylinder or an air cylinder. The intermediate portion of the presser member 79 in the length direction and the bent portion of the bent link member 81 are connected by a connecting link member 87, and the presser member 79 and the connecting link member 87 are connected by a shaft 88, and the bent link member 81 is connected. The connection link member 87 is connected by a shaft 89.

  Further, the second clamping means 73 has a gap securing means 90 that secures a gap 82 between the pressing member 79 and the clamp body 77 that is necessary for loosely clamping the flange portion 13 of the article to be heat treated 10. Is provided. The clearance securing means 90 in the present embodiment includes a bolt 91 screwed downward into the clamp body 77 and a lock nut 92 for locking the bolt 91 to the clamp body 77. As shown in FIG. 9, the receiving portion 79 </ b> A on the lower surface of the pressing member 79 contacts the head portion 91 </ b> A of the bolt 91, so that the thickness of the flange portion 13 is between the pressing member 79 and the clamp body 77. A large gap 82 is formed.

  As shown in FIG. 10, when the piston rod 85 </ b> A of the cylinder 85 is contracted and operated, the presser member 79 is largely opened and rotated around the shaft 80 due to the action of the bent link member 81 and the connecting link member 87. To do. When the presser member 79 is opened and rotated in this manner, the setting operation of the heat-treated article 10 to be quenched to the clamp device 20 is performed. Further, as shown in FIG. 9, when the piston rod 85A of the cylinder 85 is extended and operated, the presser member 79 is closed to a position where a clearance 82 is opened between the clamp member 77 and the flange portion 13 is loosely clamped. The gap 82 has a size set by the gap securing means 90. Thus, when the flange part 13 is loosely clamped by the second clamping means 73, the quenching operation for the article to be heat-treated 10 is performed. When the pressing member 79 is opened and rotated by the contraction operation of the piston rod 85A, in other words, when the clamp by the pressing member 79 is released, the quenched article 10 to be heat-treated is taken out from the clamping device 20.

  When the presser member 79 closes and pivots about the shaft 80 by the extension operation of the piston rod 85A of the cylinder 85, the presser member 79 corresponding to the same extension amount of the piston rod 85A is caused by the action of the bending link member 81 and the connecting link member 87. The amount of rotation gradually decreases. The bent link member 81 and the connecting link member 87 are members for gradually increasing and transmitting the load from the piston rod 85A to the presser member 79 in the toggle mechanism constituting the second clamp means 73. When the pressing member 79 presses the upper surface of the flange portion 13 downward, the clamping force for the pressing member 79 to clamp the flange portion 13 loosely increases.

  Accordingly, when the article to be heat-treated 10 is fixedly set on the clamping device 20 with the first clamping means and the second clamping means 73, which are not shown in FIGS. 9 and 10, as described above, A large load for causing the article to be heat-treated 10 to be curved and convex upward can be generated in the second clamp means 73. In addition, since the first clamp means has the same toggle mechanism structure as that of the second clamp means 73, a large load is generated on the first clamp means to cause the article to be heat-treated 10 to bend and bend upward. Can be made.

  FIG. 11 is a partially enlarged view of the second clamping means 73 when the pressing member 79 clamps the flange portion 13 loosely. When the flange portion 13 is loosely clamped by the load from the presser member 79, the presser member 79 tries to turn the presser member 79 upward about the shaft 80 as a reaction force from the flange portion 13. An upward force F acts. The upward force F is a force for rotating the connecting link 87 about the shaft 89 in the shaft 88 which is a connecting portion between the pressing member 79 and the connecting link member 87. The connecting link member 87 is oriented in such a direction that the position of the shaft 89 at the upper end of the connecting link member 87 is a position on the article to be heat-treated 10 with reference to the upward force F on the shaft 88. Therefore, the connecting link member 87 is not rotated upward about the shaft 89 by the upward force F.

  For this reason, after the presser member 79 clamps the flange portion 13 loosely, the presser member 79 does not open and rotate around the shaft 80 due to the reaction force from the flange portion 13. Even if the pressure of the pressure fluid that extends and operates the rod 85A is released, the loose clamp state of the flange portion 13 by the pressing member 79 can be maintained. When the second clamp means 73 is a manual type that does not use a cylinder, the presser member 79 is a lever that is manually rotated around the shaft 80, and the presser member 79 loosens the flange portion 13. After clamping, it is not necessary to continue to apply manual operating force.

  Further, the second clamping means 73 of this embodiment is configured to secure a clearance 82 between the pressing member 79 and the clamp body 77 when the pressing member 79 clamps the flange portion 13 loosely. Is provided with a bolt 91 and a lock nut 92. By loosening the lock nut 92 and rotating the bolt 91, this means 90 is provided. The size of the gap 82 into which the flange portion 13 is inserted and arranged can be adjusted. For this reason, the size of the gap 82 is adjusted to an appropriate size corresponding to the amount of bending deformation of the article to be heat-treated 10 that occurs when the quenching region 14 of the article to be heat-treated 10 is heated by the heating device. be able to.

  Further, since the second clamp means 73 is attached to the elevating member 72 whose height position can be changed by the long hole 71A, the clamp position of the second clamp means 73 for loosely clamping the flange portion 13 is set in the Z direction. Can be adjusted. For this reason, for example, by making the clamping position in the first clamping means (not shown) for tightly clamping the flange portion 13 adjustable in the Z direction by means similar to the long hole 71A or other means, Z The quenching operation for various shapes of the heat-treated article whose direction position changes in the X direction can be performed by using the same clamping device 20, and the heat-treated article 10 is composed of the first clamping means and the second clamping means 73. When clamped with the above, it is possible to adjust the magnitude of the curved convex deformation amount of the article to be heat-treated 10 necessary for eliminating or reducing the warpage deformation of the article to be heat-treated 10.

  The clamping position for clamping the flange portion 13 in the first clamping means and the second clamping means 73 can be adjusted in the Z direction without adopting the above-described method using the long hole 71A. In addition, the clamp body 77 can be achieved by attaching and detaching the base members installed on the upper surface, and interposing spacers such as shims having different thicknesses between these base members and the work table 21. . According to this method, the height position of each clamp means can be changed while ensuring parallelism in the horizontal direction.

  12 to 16, the upper clamp member and the lower clamp member of the first clamp means and the second clamp means are arranged on separate members, and the article to be heat-treated 10 is moved by raising and lowering the lower clamp member with respect to the upper clamp member. 1 shows an embodiment of a clamping device 100 that automatically performs clamping and unclamping.

  As shown in FIG. 12, the clamping device 100 according to this embodiment is attached to a frame-like main body 101 formed by a combination of columns, horizontal beams, and the like, and a hydraulic cylinder 102 installed upward on the frame-like main body 101. And an immovable member 104 coupled to the frame-shaped main body 101 immediately above the elevating member 103. The upper clamp member 114 and the lower clamp member 115 formed in the block shape of each of the first clamp means 112 are separately disposed in the stationary member 104 and the elevating member 103, and each plate of the second clamp means 113 is disposed. The upper clamp member 116 and the lower clamp member 117 that are formed in a shape are also arranged separately in the immovable member 104 and the elevating member 103. The article to be heat-treated 10 is placed on receiving portions 119A and 119B provided on the traveling body 119 that is guided by the rail 118, and the traveling body 119 is guided to the rail 118 installed at a high position by the support column 118A. As shown in FIG. 13, the elevating member 103 starts to rise by the hydraulic cylinder 102 when the elevating member 103 and the stationary member 104 are stopped after traveling.

  FIG. 15 shows a sectional view taken along line S15-S15 of FIG. As shown in FIG. 15, a guide portion 117A extending inward in the Y direction as it extends downward is formed on the upper portion of the lower clamp member 117 of the second clamp means 113, and the lower portion of this guide portion 117A is It becomes the hollow part 117B. Therefore, when the lower clamp member 117 is raised by the elevating member 103 as described above, the flange portion 13 of the article to be heat-treated 10 placed on the receiving portions 119A and 119B of the traveling body 119 is guided by the guide portion 117A. , While being positioned in the Y direction with respect to the two lower clamp members 117 arranged in parallel in the Y direction, it falls into the recess 117B.

  As a result, the article to be heat-treated 10 is placed and set on the lower clamp members 115 and 117 of the first clamp means 112 and the second clamp means 113, respectively, and delivered from the receiving portions 119A and 119B of the traveling body 119. The placing set on the lower clamp members 115 and 117 of the heat treatment article 10 is performed while the lower clamp members 115 and 117 are being lifted by the elevating member 103.

  Further, when the article to be heat-treated 10 is placed and set on the lower clamp members 115 and 117, the coolant flow pipe 120 of the cooling device shown in FIG. 12 attached to the elevating member 103 is shown in FIG. As described above, the heat treatment article 10 enters the inside of the raised portion 11 from the back side. In addition, as shown in FIG. 12, a taper-shaped positioning pin 121 is attached to the elevating member 103 upward via a support column 122. Therefore, as shown in FIGS. The positioning pin 121 is inserted into the hole 10A formed in the article 10 because it is necessary for the function of the article 10, whereby the article to be heat-treated 10 is positioned in the X direction.

  Thereafter, when the elevating member 103 is further raised, as shown in FIG. 16, which is a cross-sectional view taken along line S16-S16 in FIG. An inclined portion 116A formed at the lower portion of the clamp member 116 engages with the guide portion 117A of the lower clamp member 117, thereby positioning the upper and lower clamp members 116, 117 in the Y direction. 14, the flange portion 13 is clamped and fixed by upper and lower clamp members 114 and 115 of the first clamp means 112, and the flange portion 13 is fixed to the upper and lower portions of the second clamp means 113 as shown in FIG. The clamp members 116 and 117 are clamped loosely. In this loose clamp, when the projection 116B protruding from the lower portion of the inclined portion 116A of the upper clamp member 116 is inserted into the recess 117B of the lower clamp member 117, the distal end surface of the projection 116B and the recess 117B A gap 123 larger than the thickness of the flange portion 13 is formed between the bottom surface and the bottom surface.

  Further, when the flange portion 13 is clamped by the first clamping means 112 and the second clamping means 113 in this way, the clamping means 112 and 113 are used similarly to the clamping device 20 of the embodiment of FIGS. In addition, a load that causes the article to be heat-treated 10 to bend and deform in the protruding direction of the protruding portion 11 is applied to the flange portion 13.

  In this embodiment, the adjustment of the load for curving and projecting the article to be heat-treated 10 is performed between the elevating member 103 and the lower clamp members 115 and 117 of the first clamp means 112 and the second clamp means 113, or immovable. This is performed by interposing shims having different thicknesses between the member 104 and the upper clamp members 114 and 116 of the first clamp means 112 and the second clamp means 113.

  As described above, when the article to be heat-treated 10 is clamped by the first clamp means 112 and the second clamp means 113, the heating device 124 attached to the immovable member 104 is set on the article to be heat-treated 10. The quenching region 14 of the article to be heat-treated 10 is heated by induction heating by the high-frequency current of the heating device 124, and the article to be heat-treated 10 is cooled by the coolant ejected from the coolant circulation pipe 120. .

  After the quenching operation in the quenching region 14 is completed in this way, the lifting member 103 is lowered by the hydraulic cylinder 102, and the article to be heat-treated 10 is delivered to the receiving portions 119A and 119B of the traveling body 119 during the lowering. It is. Next, the article to be heat-treated 10 is sent to the next process such as a painting process by the traveling of the traveling body 119.

  According to the clamping device 100 of this embodiment, the work to be heat-treated article 10 is carried to the position where it is clamped by the first clamp means 112 and the second clamp means 113, and the heat-treated article 10 after the quenching work is completed to the next process. The work to be carried out can be performed as an automatic work by the traveling of the traveling body 119, and the workability is improved.

  Further, according to the clamping device 100 of this embodiment, since the heating device 124 is attached to the immovable member 104 that does not move up and down, the large heating device 124 itself and an electric cable or the like that connects the heating device 124 and the power supply device are connected. It can be set as the structure which does not raise / lower, For this reason, the structure of the clamp apparatus 100 whole can be simplified.

  The clamp device 130 according to the embodiment of FIGS. 17 and 18 is omitted from the rail 118 and the traveling body 119 in the clamp device 100 as compared with the clamp device 100 of the embodiment of FIGS. A traveling body 133 that travels while being guided by rails 132 laid on the floor of the frame-shaped main body 131 is employed, and a hydraulic cylinder 102 for raising and lowering the elevating member 103 is installed on the traveling body 133. The other structure is the same as that of the clamping device 100.

  In the clamp device 130 according to this embodiment, when the traveling body 133 reaches the outside of the frame-shaped main body 131, the article to be heat-treated 10 is placed on the lower clamps 115 and 117 of the first clamp means 112 and the second clamp means 113. As shown in FIG. 17, after the elevating member 103 reaches just below the stationary member 104 by traveling of the traveling body 133, the elevating member 103 is moved to the highest position by the hydraulic cylinder 102 as shown in FIG. 18. Ascend to position. As a result, the flange portion 13 of the article to be heat treated 10 is clamped by the first clamping means 112 and the second clamping means 113.

  As described above, in this embodiment, the mounting set of the article to be heat-treated 10 on the lower clamp members 115 and 117 is before the lifting member 103 and the lower clamp members 115 and 117 start to rise in the hydraulic cylinder 102. Made. For this reason, according to this embodiment, unlike the embodiments of FIGS. 12 to 16, receiving portions 119 </ b> A and 119 </ b> B for placing the article to be heat-treated 10 are provided at a height position in the middle of ascent of the elevating member 103. A complicated structure for keeping the traveling body 119 on standby is not necessary, and the structure of the entire clamp device 130 can be simplified.

  19 and 20, as in the embodiment of FIGS. 12 to 16 and the embodiment of FIGS. 17 and 18, the upper clamp member and the lower clamp member of the first clamp means and the second clamp means are fixed members. Another embodiment in the case of being separated into a lifting member and a lifting member is shown.

  As shown in FIG. 19, a pressing member 138 is attached to a bracket 137 </ b> A provided on the lower clamp member 137 so as to be swingable up and down about a shaft 138 </ b> A, and a hydraulic cylinder 139 is connected to the pressing member 138. . For this reason, when the article to be heat-treated 10 is placed and set on the lower clamp member 137 disposed on the lifting member (not shown), as shown in FIG. The lower clamp member 137 and the presser member 138 are clamped and fixed.

  The upper clamp member 136 shown in FIG. 20 is disposed on a non-illustrated immovable member that is displaced in the X direction with respect to the presser member 138. As shown, the lower surface of the upper clamp member 136 abuts on the flange portion 13, and thereafter, the presser member 138 is swung upward about the shaft 138 </ b> A by the hydraulic cylinder 139 to release the clamping and fixing of the flange portion 13. . Thereby, the flange portion 13 is clamped by the upper clamp member 136 and the lower clamp member 137.

  Since the upper and lower clamp members 136 and 137 shown in FIGS. 19 and 20 are of the second clamp means for clamping the flange portion 13 loosely, the upper clamp member 136 of the upper clamp member 136 is clamped when the flange portion 13 is clamped. A gap 140 larger than the thickness of the flange portion 13 is generated between the lower surface and the upper surface of the lower clamp member 137.

  According to this embodiment, until the article to be heat-treated 10 is clamped by the upper clamp member 136 and the lower clamp member 137, the flange portion 13 can be reliably pressed against the lower clamp member 137 by the presser member 138. .

  As shown in FIG. 19, the pressing member 138 that swings with the hydraulic cylinder 139 can be provided on the lower clamp member 137 with respect to the first clamp means. Of the first clamp means and the second clamp means, This can be done for either one of these.

  FIG. 21 shows the case where the upper clamp member and the lower clamp member of the second clamp means which are loose clamp means are arranged separately in a stationary member and a lifting member. Embodiment which can adjust the loose clamp position by a clamp member to a Z direction with a turnbuckle type adjustment means is shown.

  The upper clamp member 146 includes a right screw shaft 149 and a left screw shaft 150 connected by a long nut 148, and the lower clamp member 147 also includes a right screw shaft 152 and a left screw shaft 153 connected by a long nut 151. It consists of The lower clamp member 147 is attached to an elevating member (not shown), and the flange portion 13 of the article to be heat-treated 10 is placed and set on a receiving portion 153A formed at the upper end of the left screw shaft 153 of the lower clamp member 147. When the lower clamp member 147 is moved up to the highest position toward the upper clamp member 146 attached to a non-moving member not shown by the elevating member, as shown in FIG. 21, the flange portion 13 is connected to the receiving portion 153A. The upper clamp member 146 is loosely clamped by the presser portion 149A formed at the lower end of the right screw shaft 149.

  By rotating the long nut 148 of the upper clamp member 146 and the long nut 151 of the lower clamp member 147 while stopping the rotation of the right screw shafts 149 and 152 and the left screw shafts 150 and 153, the upper clamp member 146 and the lower clamp member The vertical length of 147 is changed. As a result, the height positions of the receiving portion 153A and the holding portion 149A are changed, and the position in the Z direction where the flange portion 13 is clamped loosely is adjusted. For this reason, when the flange part 13 is clamped with the 1st clamp means and the 2nd clamp means, the curvature convex deformation amount of the to-be-heat-processed article 10 to the protruding direction of the protruding part 11 can be adjusted.

  Note that such a turnbuckle-type adjusting means may be employed only in one of the upper clamp member 146 and the lower clamp member 147 by making it possible to change the highest position of the lower clamp member 147 by the elevating member. Good.

  The turnbuckle mechanism as described above can also be used to adjust the lengths of the upper clamp member and the lower clamp member of the first clamp means and the second clamp means. According to this, the position for clamping the non-quenched region of the article to be heat-treated in the respective clamping means can be adjusted in the Z direction, whereby the position of the non-quenched region in the Z direction changes in the X direction. The same clamping device can be used in common for the articles to be heat-treated in various shapes, and the clamping device has versatility.

  Further, the length adjusting means in the Z direction by the turnbuckle mechanism as described above is at least one of the upper clamp member and the lower clamp member of the second clamp means as the loose clamp means having various structures. It can also be used to adjust the length. According to this, it is possible to adjust the size of the gap in which the non-quenched region of the article to be heat-treated in the loose clamp means is inserted and arranged, so that the size of this gap is set when the quenched region is heated. It becomes possible to set an appropriate size with respect to the amount of curved deformation of the heat-treated article generated with the side of the quenching region as a convex side, and for various heat-treated articles having different amounts of curved deformation. But it will be possible.

  23 and FIG. 24 show the article to be heat treated in the Y direction that occurs when the quenching area 164 of the article to be heat treated 160 shown in FIG. 22 is heated and then the quenching area 164 is cooled from the back side of the article to be heat treated 160. 6 shows a clamping device 170 according to an embodiment for eliminating or reducing the occurrence of 160 warp deformation.

  As shown in FIG. 22, the heat-treated article 160, which is a press-formed product of a steel plate, has a length extending in the X direction, which is the longitudinal direction, as in the heat-treated article 10 in FIG. It has a three-dimensional shape in which a raised portion 161 raised in the Z direction perpendicular to the X direction and the Y direction is provided in the middle of the Y direction which is the width direction perpendicular to each other, and both sides of the raised portion 161 in the Y direction Two flange portions 163 that extend outward in the Y direction from the raised base end portion 162 of the rim.

  The raised portion 161 continuously extends in the X direction, and the dimension of the raised portion 161 in the Y direction is the same in the X direction, unlike the raised portion 11 in FIG. In addition, the quenching region 164 of the article to be heat-treated 160 is defined by two in the Y direction in a part of the raised portion 161, similarly to the quenching region 14 of FIG. 2, and is quenched by extending in the X direction. The region 164 and the non-quenched region 165 are juxtaposed in the Y direction.

  FIG. 23 shows a first clamp means 172 that is a tight clamp means for clamping and fixing one end portion in the X direction of the flange portion 163 that is the non-quenched region 165 of the clamp device 170, FIG. 24 shows the second clamp means 173 which is a loose clamp means arranged from the first clamp means 172 to the other end side in the X direction. The number of the first clamping means 172 disposed for each of the two flange portions 163 is one in the X direction, and the number of the second clamping means 173 in the X direction is plural. The two clamp means 173 are separated in the X direction.

  The basic structures of the first clamping means 172 and the second clamping means 173 are the same as the first clamping means 22 and the second clamping means 23 described with reference to FIGS.

  That is, as shown in FIG. 23, the first clamping means 172 is configured by a clamp body 174 and a pressing member 175 fastened by a detachable fastener 176A to the upper surface of the clamp body 174, and the flange portion 163 is The clamp body 174 and the pressing member 175 are clamped and fixed. Further, as shown in FIG. 24, the second clamp means 173 includes a clamp body 177 and a press member 179 connected to the clamp body 177 via a connecting member. The press member 179 is connected to the connecting member. On the other hand, the shaft 180 can be swung up and down around the shaft 180, the holes formed in the pressing member 179 and the connecting member are matched, and the pin 181 is inserted into these holes, whereby the pressing member 179 is inserted. Is vertically opposed to the clamp body 177 with a gap 182 in the Z direction larger than the thickness of the flange portion 163.

  The pressing member 175 of the first clamping unit 172 shown in FIG. 23 has a length in the Y direction sufficient to reach the raised base end 162 of the article to be heat-treated 160, and the holding member 175 of the second clamping unit 173 shown in FIG. The member 179 also has a length in the Y direction sufficient to reach the raised base end 162 of the article to be heat-treated 160. For this reason, as shown in FIGS. 23 and 24, when the flange portion 163 is clamped by the first clamping means 172 and the second clamping means 173, there is no need to indicate that the two-dot chain line in FIGS. Compared to the heat-treated article 160 ′ in the natural state of the load, the two raised base end portions 162 on both sides in the Y direction of the heat-treated article 160 are pressed and displaced inward in the Y direction.

  The direction in which the two raised base ends 162 are pressed and displaced by the loads from the holding members 175 and 179 in this way is the cooling fluid flow pipe 192 of the cooling device, which is the inside or outside of the raised portion 161. It is the inside of the raised ridge 161.

  For the quenching operation, the quenching region 164 of the article to be heat-treated 160 is heated to the same or substantially the same high temperature with respect to the entire thickness of the article to be heat-treated 160 in the quenching region 164 by the heating device 190. When the thickness portion on the back side in the inner wall is cooled with the coolant ejected from the coolant flow pipe 192 disposed inside the raised portion 161, as described above, the compression yielding that occurs in the thickness portion on the front side For this reason, the warp deformation in the Y direction described above, which attempts to widen the opening of the raised portion 161, is originally generated in the article to be heat-treated 160.

  However, in this embodiment, since the two raised base ends 162 are pressed and displaced to the opposite side of the warp deformation, the quenching operation is performed, and thus the article to be heat-treated when the clamp by the clamp device 170 is released. It is possible to eliminate or reduce the occurrence of warping deformation in the Y direction in 160.

  Such a Y-direction warpage deformation suppressing means is such that the distal ends of the pressing members 175 and 179 press and displace the raised base end portion 162 of the article to be heat-treated 160 to the inside of the raised portion 161. When the clamping device in which the means and the second clamping means are provided with the warp deformation occurrence suppressing means is applied as it is for clamping the article to be heat treated 10 shown in FIG. Since the width of the direction is tapered to one side in the X direction where the flange portion 13 tries to move due to thermal expansion due to heating, there is a problem that this movement is prevented.

  However, when the first clamp means and the second clamp means clamp the article to be heat treated 10 shown in FIG. 2 by the clamp apparatus provided with the warp deformation occurrence suppression means, the first clamp means and the second clamp means in this clamp apparatus. 2 The above-mentioned problem is solved by setting the arrangement position of the clamp means to be opposite to the arrangement positions of the first clamp means 22 and the second clamp means 23 of the clamp device 20 in FIGS. 3 and 4 in the X direction. be able to. Therefore, the warp deformation occurrence suppressing means can also be applied to a clamping device for clamping the heat-treated article 10 of FIG.

  23 and 24, the warp deformation occurrence suppressing means includes the clamp device described in FIGS. 7 and 8, the clamp device described in FIGS. 9 to 11, the clamp device described in FIGS. 18 can be applied to the clamping device described with reference to FIG. 18, the clamping device described with reference to FIGS. 19 and 20, and the clamping device described with reference to FIG.

  In the present invention, like a reinforcing member for a center pillar of a four-wheel vehicle, a heat treatment region and a non-heat treatment region are extended and defined in the longitudinal direction, and the heat treatment region and the non-heat treatment region are juxtaposed in the width direction. It can be used for clamping the heat-treated article when the elongated heat-treated article is heat-treated.

It is an enlarged view which shows a part of side panel of the four-wheeled vehicle in which the reinforcing member for center pillars clamped with the clamp apparatus which concerns on one Embodiment of this invention is used. It is a perspective view which shows the whole reinforcement member for center pillars which is a to-be-heated article. It is a perspective view which shows the whole clamp apparatus which clamps the reinforcing member for center pillars as a heat-treated article. It is a front view of the clamp apparatus of FIG. FIG. 5 is a cross-sectional view taken along line S5-S5 of FIG. FIG. 6 is a sectional view taken along line S6-S6 of FIG. It is a figure similar to FIG. 5 which shows the 1st clamp means of embodiment which can perform the clamp of a to-be-processed article, and clamp release automatically. It is a figure similar to FIG. 6 which shows the 2nd clamp means of embodiment which can perform the clamp of a to-be-processed article, and clamp release automatically. It is a figure which shows embodiment which the 2nd clamp means becomes the structure of a toggle mechanism, Comprising: It is a figure which shows one of the 2nd clamp means arrange | positioned at the both sides of the width direction of a to-be-heat-treated article. It is a figure which shows when the 2nd clamp means of embodiment of FIG. 9 cancels | releases a clamp. FIG. 10 is a partially enlarged view of FIG. 9. It is a front view which shows the clamp apparatus of embodiment with which the upper and lower clamp members of the 1st clamp means and the 2nd clamp means are divided | segmented and arrange | positioned by the raising / lowering member and the immovable member. FIG. 13 is a front view showing the raising / lowering member being raised in the clamping device of FIG. 12. FIG. 13 is a front view showing when the elevating member reaches the highest position and the article to be heat-treated is clamped by the first clamping means and the second clamping means in the clamping device of FIG. 12. It is the S15-S15 sectional view taken on the line of FIG. It is the S16-S16 sectional view taken on the line of FIG. It is a front view which shows the clamp apparatus of embodiment by which the to-be-heat-treated article is mounted and set to the lower clamp member of the 1st clamp means and the 2nd clamp means from before the raising start of the raising / lowering member, Comprising: It is a figure which shows the front. FIG. 18 is a front view showing when the elevating / lowering member reaches the highest position and the article to be heat-treated is clamped by the first clamping means and the second clamping means in the clamping device of FIG. 17. It is a figure which shows another embodiment in case the upper and lower clamp members of a 1st clamp means and a 2nd clamp means are divided | segmented into the raising / lowering member and a non-moving member, Comprising: The figure before an raising / lowering member reaches the highest position It is. FIG. 20 is a view when the elevating member reaches the highest position in the embodiment of FIG. 19. It is a figure which shows embodiment which can adjust the loose clamp position by the upper clamp member of a 2nd clamp means and a lower clamp member to a height direction with a turnbuckle type adjustment means. It is a perspective view which shows the whole to-be-heat-treated article clamped with the clamp apparatus provided with the curvature deformation | transformation suppression means about the width direction of to-be-heat-treated article. It is a figure similar to FIG. 5 which shows the 1st clamp means of the clamp apparatus which clamps the to-be-processed article of FIG. It is a figure similar to FIG. 6 which shows the 2nd clamp means of the clamp apparatus which clamps the to-be-processed article of FIG.

Explanation of symbols

10,160 Heat-treated article 11,161 Raised portion 12,162 Raised base end portion 13,163 Flange portion 14,164 Quenched region 15 which is a heat-treated region 15,165 Non-quenched region 20,100,130 which is a non-heat-treated region , 170 Clamp device 21 Work table 22, 52, 112, 172 First clamp means 23, 53, 73, 113, 173 Second clamp means 32, 82, 123, 140, 154, 182 Clearance 40, 124, 190 Heating device 42, 120, 192 Coolant flow pipe as cooling device 103 Elevating member 104 Non-moving member 114, 116, 136, 146 Upper clamp member 115, 117, 137, 147 Lower clamp member

Claims (16)

At least one heat treatment region that is heat-treated by being cooled after heating and at least one non-heat treatment region that is not heat-treated are both extended and defined in the longitudinal direction. Are elongated heat-treated articles arranged side by side in the width direction orthogonal to the longitudinal direction, and the heat-treated article for clamping the heat-treated article in a stationary set state in the non-heat treated region during the heat treatment operation In the article clamping device,
A plurality of clamping means disposed in the longitudinal direction of the article to be heat treated, and at least one of the clamping means including a clamping means disposed at a position closest to an end in the longitudinal direction; A clamp apparatus for a heat-treated article, wherein each of the clamp means is a loose clamp means that allows the heat-treated article to be curved and deformed with the heat treatment region side as a convex side.   The clamp apparatus for heat-treated articles according to claim 1, wherein the plurality of clamp means are first clamp means and second clamp means arranged in a longitudinal direction of the heat-treated article, and the first clamp The number of means is one in the longitudinal direction of the article to be heat treated, and the first clamp means is a tight clamp means for sandwiching and fixing the non-heat treated region. The number of the second clamp means disposed apart from each other in the direction is at least one in the longitudinal direction of the article to be heat treated, and the second clamp means serves as the loose clamp means. Clamp device for heat-treated articles.   The clamp apparatus for heat-treated articles according to claim 1 or 2, wherein a position for clamping the non-heat treated region in each of the plurality of clamping means can be adjusted in a direction orthogonal to the longitudinal direction and the width direction. A heat-treatable article clamping device, characterized in that   The clamp device for heat-treated articles according to any one of claims 1 to 3, wherein a size of a gap into which the non-heat-treated region is inserted and arranged in the loose clamp means is adjustable. Heat treatment article clamping device.   The clamp apparatus for heat-treated articles according to any one of claims 1 to 4, wherein the loose clamp means includes a movement smoothing means for smoothening the movement of the non-heat treated region in the longitudinal direction of the heat-treated article. A clamp device for an article to be heat-treated is provided.   The clamp apparatus for heat-treated articles according to any one of claims 1 to 5, wherein at least one of the plurality of clamping means has a toggle mechanism structure. Clamp device for heat-treated articles.   In the clamp device for heat-treated articles according to any one of claims 1 to 6, the heat-treated article is an article made of a plate material, and the article to be heat-treated is in the middle of the width direction orthogonal to the longitudinal direction. The ridge has a three-dimensional shape provided with ridges extending in the direction perpendicular to the longitudinal direction and the width direction and extending in the longitudinal direction, and from the ridge base ends on both sides of the ridge in the width direction. Two flange portions extending outward in the width direction are provided, at least a part of the raised portion is the heat treatment region, and for each of the two flange portions that are the non-heat treatment region, A clamp apparatus for an article to be heat-treated, wherein a plurality of clamping means are arranged in the longitudinal direction of the article to be heat-treated.   8. The clamp apparatus for a heat-treated article according to claim 7, wherein the plurality of clamping means are configured to cause the heat-treated article to be curved and convexly deformed to one side in a direction orthogonal to the longitudinal direction and the width direction. A clamp device for an article to be heat-treated, wherein a load is applied to the non-heat treatment region, and the cooling for heat treatment is performed from the other side in a direction orthogonal to the longitudinal direction and the width direction. .   The clamp apparatus for heat-treatable articles according to claim 8, wherein the side on which the cooling is performed is one of the inside and outside of the raised portion, and the plurality of clamping means are on both sides of the raised portion in the width direction. For the article to be heat-treated, a load is applied to the article to be heat-treated to press and displace the raised base end portion of the raised portion toward the one of the inside and outside of the raised portion in the width direction. Clamping device.   The heat-treatable article clamping device according to any one of claims 1 to 9, wherein a plurality of the loose clamp means are provided in a state of being separated from each other in a longitudinal direction of the heat-treated article. Clamping device.   The clamp device for heat-treated articles according to any one of claims 1 to 10, wherein each of the plurality of clamp means includes an upper clamp member and a lower clamp member that are arranged to face each other in the vertical direction. The upper clamp member and the lower clamp member are a clamp device for a heat-treated article arranged on a work table for setting the heat-treated article.   The clamp apparatus for heat-treatable articles according to any one of claims 1 to 10, wherein at least one of the plurality of clamp means includes an upper clamp member and a lower clamp member that are arranged to face each other in the vertical direction. A clamp device for a heat-treated article, wherein at least one of the upper clamp member and the lower clamp member is disposed on an elevating member that moves up and down relative to the other.   The clamp device for a heat-treated article according to claim 12, wherein the lower clamp member is disposed on the elevating member, and the heat-treated article is placed and set on the lower clamp member, and the elevating member The heat-treatable article clamping apparatus, wherein the article to be heat-treated is clamped by the upper clamp member and the lower clamp member by raising the lower clamp member.   14. The clamp apparatus for a heat-treated article according to claim 13, wherein the set of the article to be heat-treated on the lower clamp member is performed during the ascent of the lower clamp member by the elevating member. Clamp device for heat-treated articles.   14. The apparatus for clamping a heat-treated article according to claim 13, wherein the set of the heat-treated article on the lower clamp member is made before the lower clamp member starts to rise by the elevating member. Clamp device for heat-treated article.   16. The clamp device for a heat-treated article according to any one of claims 12 to 15, wherein the upper clamp member is disposed on a stationary member to which a heating device for heating the heat treatment region of the heat-treated article is attached. Clamping device for article to be heat-treated

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